src/mesa/drivers/dri/intel/intel_ioctl.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include <stdio.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32 #include <sched.h>
  33 #include <sys/types.h>
  34 #include <sys/ioctl.h>
  35
  36 #include "mtypes.h"
  37 #include "context.h"
  38 #include "swrast/swrast.h"
  39
  40 #include "intel_context.h"
  41 #include "intel_ioctl.h"
  42 #include "intel_batchbuffer.h"
  43 #include "intel_blit.h"
  44 #include "intel_regions.h"
  45 #include "drm.h"
  46 #include "i915_drm.h"
  47
  48 #include "intel_bufmgr.h"
  49
  50 #define FILE_DEBUG_FLAG DEBUG_IOCTL
  51
  52 int
  53 intelEmitIrqLocked(struct intel_context *intel)
  54 {
  55    struct drm_i915_irq_emit ie;
  56    int ret, seq = 1;
  57
  58    if (intel->no_hw)
  59       return 1;
  60
  61    /*
  62      assert(((*(int *)intel->driHwLock) & ~DRM_LOCK_CONT) ==
  63      (DRM_LOCK_HELD|intel->hHWContext));
  64    */
  65
  66    ie.irq_seq = &seq;
  67
  68    ret = drmCommandWriteRead(intel->driFd, DRM_I915_IRQ_EMIT, &ie, sizeof(ie));
  69    if (ret) {
  70       fprintf(stderr, "%s: drm_i915_irq_emit: %d\n", __FUNCTION__, ret);
  71       exit(1);
  72    }
  73
  74    DBG("%s -->  %d\n", __FUNCTION__, seq);
  75
  76    return seq;
  77 }
  78
  79 void
  80 intelWaitIrq(struct intel_context *intel, int seq)
  81 {
  82    struct drm_i915_irq_wait iw;
  83    int ret, lastdispatch;
  84    volatile struct drm_i915_sarea *sarea = intel->sarea;
  85
  86    if (intel->no_hw)
  87       return;
  88
  89    DBG("%s %d\n", __FUNCTION__, seq);
  90
  91    iw.irq_seq = seq;
  92
  93    do {
  94       lastdispatch = sarea->last_dispatch;
  95       ret = drmCommandWrite(intel->driFd, DRM_I915_IRQ_WAIT, &iw, sizeof(iw));
  96    } while (ret == -EAGAIN ||
  97             ret == -EINTR ||
  98             (ret == -EBUSY && lastdispatch != sarea->last_dispatch) ||
  99             (ret == 0 && seq > sarea->last_dispatch) ||
 100             (ret == 0 && sarea->last_dispatch - seq >= (1 << 24)));
 101
 102    if (ret) {
 103       fprintf(stderr, "%s: drm_i915_irq_wait: %d\n", __FUNCTION__, ret);
 104       exit(1);
 105    }
 106 }
 107
 108
 109 int
 110 intel_batch_ioctl(struct intel_context *intel,
 111                   GLuint start_offset,
 112                   GLuint used,
 113                   GLboolean ignore_cliprects, GLboolean allow_unlock)
 114 {
 115    struct drm_i915_batchbuffer batch;
 116
 117    if (intel->no_hw)
 118       return 0;
 119
 120    assert(intel->locked);
 121    assert(used);
 122
 123    DBG("%s used %d offset %x..%x ignore_cliprects %d\n",
 124        __FUNCTION__,
 125        used, start_offset, start_offset + used, ignore_cliprects);
 126
 127    /* Throw away non-effective packets.  Won't work once we have
 128     * hardware contexts which would preserve statechanges beyond a
 129     * single buffer.
 130     */
 131    batch.start = start_offset;
 132    batch.used = used;
 133    batch.cliprects = intel->pClipRects;
 134    batch.num_cliprects = ignore_cliprects ? 0 : intel->numClipRects;
 135    batch.DR1 = 0;
 136    batch.DR4 = ((((GLuint) intel->drawX) & 0xffff) |
 137                 (((GLuint) intel->drawY) << 16));
 138
 139    DBG("%s: 0x%x..0x%x DR4: %x cliprects: %d\n",
 140        __FUNCTION__,
 141        batch.start,
 142        batch.start + batch.used * 4, batch.DR4, batch.num_cliprects);
 143
 144    if (drmCommandWrite(intel->driFd, DRM_I915_BATCHBUFFER, &batch,
 145                        sizeof(batch))) {
 146       fprintf(stderr, "DRM_I915_BATCHBUFFER: %d\n", -errno);
 147       return -errno;
 148    }
 149
 150    return 0;
 151 }
 152
 153 int
 154 intel_exec_ioctl(struct intel_context *intel,
 155                  GLuint used,
 156                  GLboolean ignore_cliprects, GLboolean allow_unlock,
 157                  struct drm_i915_gem_execbuffer *execbuf)
 158 {
 159    int ret;
 160
 161    assert(intel->locked);
 162    assert(used);
 163
 164    if (intel->no_hw)
 165       return 0;
 166
 167    execbuf->batch_start_offset = 0;
 168    execbuf->batch_len = used;
 169    execbuf->cliprects_ptr = (uintptr_t)intel->pClipRects;
 170    execbuf->num_cliprects = ignore_cliprects ? 0 : intel->numClipRects;
 171    execbuf->DR1 = 0;
 172    execbuf->DR4 = ((((GLuint) intel->drawX) & 0xffff) |
 173                    (((GLuint) intel->drawY) << 16));
 174
 175    do {
 176       ret = ioctl(intel->driFd, DRM_IOCTL_I915_GEM_EXECBUFFER, execbuf);
 177    } while (ret == -EAGAIN);
 178
 179    if (ret != 0) {
 180       fprintf(stderr, "DRM_I915_GEM_EXECBUFFER: %d\n", -errno);
 181       return -errno;
 182    }
 183
 184    return 0;
 185 }